Attachment for telephones.



' v.1 MILLER.

ATTACHMENT FOR TELEPHONES.

APPLICATION FILED APR. 18. 19H- -1,253,"861. Patented Jan.1 5, 1918.

WITNESSES T44 91:. win/J ATTORNEYS "UNITED STATES Parana? OFFICE.

VOLNEY T. MILLER, OF HUICHINSQN, KANSAS, ASSIGNOR 0F ONE-TEAL"? T0 ROY B. COCHRAN, 0F I-IUTCHINSON, KANSAS.

ATTACHMENT FOR TELEPHONES.

Specification of Letters Patent.

Patented Jan. 15, 1918.

Application filed April 18, 1917. Serial N 0. 162,896. e

To all whom it may concern:

Be it known that I, VoLxnY T. MILLER, a citizen of the United States, and a resident of Hutchinsom'in the county of Reno and State of Kansas, have made certain new and useful Improvements in Attachments for Telephones, of which the following is a specification.

My invention is an improvement in attachments for telephones, and has for its object to provide an attachment of the character specified for locking the mouth piece to the transmitter.

In the drawing:

Figure l is a front view of a transmitter showing the attachment in place, and with the mouth piece removed.

Fig. 2 is a section on the line :22 of Fig. 1, looking in the direction of the arrows adjacent to the line.

Fig. 3 is a perspective view' with the mouth piece detached, and,

Fig. 4 is a partial section showing the manner of removing the attachment.

The present embodiment of the invention is shown in connection with a transmitter 1, having the usual mouth piece 2, which has a threaded extension 3, for engaging within a threaded opening 4 in the transmitter to hold the mouth piece in place.

The improvement comprises a plate 5 of thin sheet metal, shaped to fit over the transmitter at the mouth piece, and having a central opening 6 for receiving the extension 3. At this central opening the plate has struck up lugs or tongues 7, which are adapted to engage notches 8 in the mouth piece, and to lock the mouth piece against turning movement until the tongues are released.

The tongues are resilient so that they do not interfere with the turning of the mouth piece into place, and snap up into the notches when the mouth piece is in place to lock the same against reverse movement until they are released, in a manner to be presently described.

The plate 5 has an extension 9, which is recessed as shown at 10 to receive the name plate 11 on the transmitter, and at each end of the recess the plate has bent up portions 12 adapted to receive a pointed instrument 13, to be later described. These bent up portions 12 are formed by parallel slits in the plate, the material being bent up between the slits to form catches for engagement by the tool.

In use the plate or disk is first placed on the transmitter, as shown in Figs. 1 and 3, after the mouth piece has been removed. The disk is so splaced that the name plate 11 will engage the recess in the extension 9, and after the mouth piece has been turned down into place the tongues 7 will engage the notches 8, locking the mouth piece in place. To release the mouth piece, the tool 13 shown in Fig. at is engaged with the catches 12, and the plate is lifted as shown in Fig. l at the extension 9 until the extension will pass over the number plate 11. Thus the tongues 7 are moved in a reverse direction out of the notches 8, and the mouth piece may be unscrewed in the usual manner.

I claim:

1. An attachment of the character specified comprising in combination with a transmitter and a mouth piece having threaded engagement therewith, of a disk fitting the face of the transmitter and having an opening for receiving the mouth piece, said disk having struck up lugs at its inner edge, and the mouth piece having notches for engagement by the lugs to prevent reverse move ment of the mouth piece, the disk having an extension provided with a notch for receiving the name plate on the transmitter to prevent turning movement of the disk, and means on the extension for permitting the same to be released.

2. In combination with a telephone transmitter and the mouth piece thereof, means for locking the mouth piece from reverse movement, said means comprising a disk having a central opening for the mouth piece and having resilient tongues, the mouth piece having notches for engagement by the tongues to prevent reverse movement thereof, and the disk having a recess for receiving the name plate to prevent turning movement of the disk.

3. In combination With a telephone transthe disk having means for engaging the mitter and the mouthpiece therefor, means name plate on the transmitter to prevent refor locking the mouthpiece from reverse verse movement of the disk.

movement, said means comprising a disk VOLNEY T. MILLER. having an opening for the mouthpiece, said Witnesses:

mouthpiece and disk having interengaging J. F. CORRIGAN,

means for preventing reverse movement, and MAE DEAL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, 50. G. 

